Castries is the capital and main harbour town of Saint Lucia, a volcanic, rainforest-covered island in the Eastern Caribbean. The city wraps around a deep natural harbour beneath the Morne Fortune ridge, with a compact centre of markets, the Cathedral Basilica and Derek Walcott Square.
Beyond town, the island is best known for the UNESCO-listed Pitons near Soufriere, the drive-in Sulphur Springs, beaches such as Reduit Beach and the fort ruins of Pigeon Island.
Castries is one of the Eastern Caribbean's busiest cruise calls, with up to five ships a day in the October–April season.